Hi does anyone know about cloud mining? Does it make any sense? Some people say it's a scam, as you naturally aren't going to get as much BTC back as if you just buy them. But doesn't this assume the price will be stable? Also it seems like this would only apply to people playing the short-term price speculation game. I don't see how the same economics wouldn't apply to investment in any other field. My head is starting to hurt from trying to do the math and economics of it, feel like I am missing something...If I think BTC is a good investment, does buying hashpower from a company in Hong Kong make sense? Or should I just buy the coins? Thanks for your help.